Fabrication of metallic nanocoil networks using mechanical self-assembly and its application to transparent functional films

• Project/Area Number: 15H03887
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Materials/Mechanics of materials
• Research Institution: Akita University
• Principal Investigator: MURAOKA Mikio 秋田大学, 理工学研究科, 教授 (50190872)
• Co-Investigator(Kenkyū-buntansha): 趙 旭 秋田大学, 理工学研究科, 助教 (20650790) ; 足立 高弘 秋田大学, 理工学研究科, 教授 (60344769) ; 倉林 徹 秋田大学, 理工学研究科, 教授 (90195537) ; 野老山 貴行 秋田大学, 理工学研究科, 准教授 (20432247)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000); Fiscal Year 2017: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2016: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2015: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
• Keywords: ナノ材料 / 金属ナノコイル / 電磁波吸収 / 透明電極 / 自己組織化 / 機能性透明フィルム / 残留応力解放 / 曲げひずみ / 力学的自己組織化 / ナノコイルの形状制御 / 電磁波吸収計測 / 伸張試験 / 導電性透明フィルム / 細線化

Outline of Final Research Achievements

This study provided a fundamental technique of fabricating metallic nanocoil (NC) networks. The technique for mass-fabricating metallic NCs by assisting the release of residual stress, was originally developed by our research group, is referred to as “mechanical self-assembly”. Thermal decomposition of electrospun resin nanofibers (NFs) was used for releasing the inhomogeneous residual strain in the biased thick metal film coating on the NF. The process conditions were optimized to reduce the coil diameters down to around 1 micrometer. Transparent resin films containing Pt NC networks ware demonstrated for stretchable electrode and electromagnetic wave absorber, which would contribute to the information-technique-based society with safety.

Research Products

• [Journal Article] Film Flow Thickness along the Outer Surface of Rotating Cones (2018)
  • Author(s): Takahiro Adachi, Yutaro Takahashi and Junnosuke Okajima
  • Journal Title: European Journal of Mechanics / B Fluids Volume: 68 Pages: 39-44
  • Peer Reviewed
• [Journal Article] Effect of Viscosity on Pumping-Up of Newtonian Fluid Driven by a Rotating Cone (2018)
  • Author(s): T. Adachi, Y. Takahashi, T. Akinaga, and J. Okajima
  • Journal Title: Journal of Flow Control, Measurement & Visualization Volume: 6 Pages: 57-65
  • Peer Reviewed / Open Access
• [Journal Article] Highly stretchable and transparent conductive film made of Pt nanocoil web (2017)
  • Author(s): X. Zhao, Y. Shitamura, and M. Muraoka
  • Journal Title: Mechanical Engineering Journal Volume: 4 Issue: 5 Pages: 16-00698-16-00698
  • DOI: 10.1299/mej.16-00698
  • NAID: 130006943427
  • ISSN: 2187-9745
  • Peer Reviewed
• [Journal Article] Electromigration Critical Product to Measure Effect of Underfill Material in Suppressing Bi Segregation in Sn-58Bi Solder (2017)
  • Author(s): X. Zhao, S. Takaya, M. Muraoka
  • Journal Title: Journal of Electronic Materials Volume: 印刷中 Issue: 8 Pages: 4999-5006
  • DOI: 10.1007/s11664-017-5507-8
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Identification of cellulosic fibers and determination of their blend ratio using terahertz spectroscopy (2017)
  • Author(s): T. Kurabayashi, H. Shuhama, S. Yodokawa, and S. Kosaka
  • Journal Title: Infrared Physics & Technology Volume: 80 Pages: 153-157
  • Peer Reviewed
• [Journal Article] Ultracompact planar positioner driven by unbalanced frictional forces (2015)
  • Author(s): Mikio Muraoka, Xu Zhao, and Shun Liu
  • Journal Title: Actuators Volume: 4 Issue: 3 Pages: 172-181
  • DOI: 10.3390/act4030172
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Low-temperature plasma treatment for releasing residual strain and forming helical nanostructures (2018)
  • Author(s): X. Zhao, N. Kamihara, and M. Muraoka
  • Organizer: ISPlasma2018/IC-PLANTS2018
  • Int'l Joint Research
• [Presentation] 固体プラズマ材料からの電磁波反射特性を利用した物性導出に関する研究 (2018)
  • Author(s): 秋山涼介，倉林徹，淀川信一，高坂諭，越高潤哉
  • Organizer: 平成29年度日本表面科学会 東北・北海道支部学術講演会
• [Presentation] 白金ナノコイル網のテラヘルツ電磁波吸収特性 (2017)
  • Author(s): 佐藤樹，村岡幹夫，倉林徹
  • Organizer: 日本機械学会2017年度年次大会
• [Presentation] プラズマ処理を利用した金属ナノコイル網の創製 (2017)
  • Author(s): 趙旭，櫻庭龍磨，村岡幹夫
  • Organizer: 日本機械学会東北支部第53期秋季講演会
• [Presentation] 電場感応白金ナノコイルシートの開発 (2017)
  • Author(s): 藤原航平，村岡幹夫，神原信幸
  • Organizer: 日本機械学会東北支部第53期秋季講演会
• [Presentation] Power consumption of liquid atomization device by using risingfilm flow along a rotating cone and disk (2017)
  • Author(s): Y. Takahashi, T. Adachi and J. Okajima
  • Organizer: 2nd International Conference on Fluid Dynamics & Aerodynamics
  • Int'l Joint Research
• [Presentation] 固体プラズマを挿入したサブミリ波帯特性可変方向性結合器 (2017)
  • Author(s): 茂木徹，淀川信一，倉林徹
  • Organizer: 応用物理学会東北支部 第72回学術講演会
• [Presentation] 白金ナノコイル透明膜の発熱特性 (2016)
  • Author(s): 秋山尚裕，趙旭，村岡幹夫
  • Organizer: 日本機械学会第24回機械材料・材料加工技術講演会（M&P2016）
  • Place of Presentation: 早稲田大学，東京
  • Year and Date: 2016-11-25
• [Presentation] メタルナノコイル網の電気特性の向上 (2016)
  • Author(s): 櫻庭龍磨，趙旭，村岡幹夫
  • Organizer: 日本機械学会第24回機械材料・材料加工技術講演会（M&P2016）
  • Place of Presentation: 早稲田大学，東京
  • Year and Date: 2016-11-25
• [Presentation] Fracture behavior of metallic nanocoil webs (2016)
  • Author(s): X. Zhao, Y. Shitamura, and M. Muraoka
  • Organizer: Asia-Pacific Conference on Fracture and Strength 2016 (APCFS2016)
  • Place of Presentation: Toyama International Conference Center, Toyama
  • Year and Date: 2016-09-19
  • Int'l Joint Research
• [Presentation] Fracture behavior of metallic nanocoil webs (2016)
  • Author(s): X. Zhao, Y. Shitamura, and M. Muraoka
  • Organizer: Asia-Pacific Conference on Fracture and Strength 2016 (APCFS2016)
  • Place of Presentation: Toyama, Japan
  • Year and Date: 2016-09-19
  • Int'l Joint Research
• [Presentation] Analysis and measurement for metamaterial sensing at THz range (2016)
  • Author(s): 楊澄晨，倉林徹，淀川信一，高坂諭
  • Organizer: 平成28年度電気関係学会東北支部連合大会
  • Place of Presentation: 東北工業大学，仙台
  • Year and Date: 2016-08-30
• [Presentation] 金属ナノコイル網のマイクロ波加熱効率の評価 (2015)
  • Author(s): 村岡幹夫、後飯塚卓也
  • Organizer: 日本機械学会第23回機械材料・材料加工技術講演会(M&P2015)
  • Place of Presentation: 広島
  • Year and Date: 2015-11-14
• [Presentation] 白金ナノコイル網のシート抵抗の計測 (2015)
  • Author(s): 下夕村勇輝、村岡幹夫、趙旭
  • Organizer: 日本機械学会第23回機械材料・材料加工技術講演会(M&P2015)
  • Place of Presentation: 広島
  • Year and Date: 2015-11-14
• [Presentation] Terahertz spectroscopic analysis using a metallic hole array (2015)
  • Author(s): C. Yang, S. Suzuki, T. Kurabayashi, S. Yodokawa, and S. Kosaka
  • Organizer: 40th Int. Conf. Infrared, Millimeter and Terahertz Waves
  • Place of Presentation: Hong Kong, China
  • Year and Date: 2015-08-23
  • Int'l Joint Research
• [Patent(Industrial Property Rights)] ナノコイル材料形成方法 (2018)
  • Inventor(s): 村岡幹夫，趙旭，神原信幸，高木清嘉，阿部俊夫
  • Industrial Property Rights Holder: 三菱重工業株式会社，国立大学法人秋田大学
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2018-034681
  • Filing Date: 2018